End of course connection

Hello,
I have a problem, I have a card mache 3.
I am making the connections to operate my limit switches. am I obliged to have a 5v power supply for linux to detect them because on my card for pins 10/11/12/13/15, I have a GND output and no input in 5v. I am the best in electronics.

I obviously saw some schema on the internet that I realized without success.

I do not know if this problem has already happened to someone with this type of card ...


Thanks, have a good day

With that card you need 12-24v at the other side of the card (centre two terminals) where the blue relay is, so that the inputs will work . You might have to connect the two grounds together as well.

Here one of the few drawings I found that show the circuits of bobs.
Hope that helps
Mike